JPH05615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a temperature sensing device for a cooking appliance, which is disposed in the center of a spiral sheathed heater such as an electric range or an electric stove and controls the temperature of the sheathed heater.

Configuration of Conventional Example and Its Problems An example of a conventional temperature sensing device will be explained based on FIG. 1. 1 is a spiral sheathed heater; 2 is a supporting metal fitting for the sheathed heater 1, which has a through hole concentric with the sheathed heater 1; Reference numeral 3 denotes a bottomed outer cylinder inserted into the through hole of the support fitting 2, 11 a signal line cover fixed to the bottom plate of the outer cylinder 3, and 9 a middle cylinder whose lower end engagement part 9A is connected to the outer cylinder 3. bottom plate and cover 11
After penetrating the top plate, it is bent inward and cannot escape upwards. Further, a bent portion 9B bent outward and downward is formed at the upper portion of the middle cylinder 9. Reference numeral 6 indicates a retaining ring which is inserted into the middle cylinder 9 and whose upper outer flange is placed on the bent part 9B of the middle cylinder 9. Reference numeral 8 is a retaining ring which is inserted into the middle cylinder 9 and whose outer periphery is placed on the upper surface of the retaining ring 6 and the middle cylinder 9. A contact plate 10 is between the bottom plate of the outer cylinder 3 and the outer flange of the retaining ring 6; 4 is a temperature sensing element placed in the retaining ring 6; 5 is an aluminum holder placed between the temperature sensing element 4 and the contact plate 8; 7 is the temperature sensing element 4; This is a disc spring that presses against the contact plate 8 via the aluminum holder 5.

In the conventional structure described above, when a pot or the like is placed on the contact plate 8, the spring 10 is succumbed to its weight, causing the contact plate 8 to descend and heating to begin. Considering that liquid such as water drips onto the contact plate 8 from above, the diameter of the upper surface of the contact plate 8 is set larger than that of the outer cylinder 3, and its outer circumference is bent downward. It is designed to prevent juice from entering the temperature sensing device. For this reason, the contact plate 8 directly receives the radiant heat from the sheathed heater 1, which tends to cause detection errors such as the detected temperature reaching the upper limit even though the object to be heated in the pan or the like is not sufficiently heated. Ta.

OBJECTS OF THE INVENTION The present invention provides a temperature sensing device for a heating cooker that can eliminate the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the temperature sensing device for a heating cooker of the present invention is provided with a fixed outer cylinder, which is movably supported within a certain range, and has an inner flange at one end. a cylinder is provided, a first spring is provided that biases the heat shield cylinder in a direction in which the inner flange side thereof is separated from the outer cylinder, and a contact plate with a temperature sensing element is provided within the heat shield cylinder so as to be movable within a certain range; A second spring is provided which presses the outer circumference of the contact plate against the inner flange by biasing the contact plate in one direction and causes the central protrusion of the contact plate to protrude outward from the heat shield cylinder.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. Components that are the same as those explained in FIG. 1 are given the same numbers and their explanations will be omitted. Reference numeral 12 denotes a heat shielding tube that fits onto the outer tube 3, and has an inner flange 12A at its upper end. 15 has an upper horizontal portion fixed to the center of the inner surface of the heat shielding tube 12, and a lower end engaging portion 15A passes through the bottom plate of the outer tube 3 and the top plate of the cover 11, and then is bent inward and cannot be pulled out upward. 13 is a first spring disposed between the upper horizontal part of the support frame 15 and the bottom plate of the outer cylinder 3; 16 is a first spring disposed between the upper horizontal part of the middle cylinder 9 and the bottom plate of the outer cylinder 3; This is a second spring disposed between the contact plate 8 and the inner flange 12A, which presses the outer circumference of the contact plate 8 against the inner flange 12A and causes the central protrusion 8A of the contact plate 8 to protrude outward from the heat shield cylinder 12. . Note that the outer peripheral portion of the contact plate 8 and the upper end of the middle tube 9 are not bent downward.

Hereinafter, the effects of the above configuration will be explained. The state shown in FIG. 2 is a state in which no pot is placed on the contact plate 8, and the radiant heat A emitted from the sheathed heater 1 heats the heat shield cylinder 12 and the contact plate 8, so that it is heated through the aluminum holder 5. Temperature sensing element 4
is heated, and the temperature sensing element 4 can accurately detect the temperature. In addition, the outer periphery of the contact plate 8 is the inner flange 12.
Since it is in surface contact with A, heat is efficiently transferred from the heat shield cylinder 12 to the contact plate 8, and liquids such as water and dirt do not enter the temperature sensing device.

The state shown in FIG. 3 is a state where the pot 17 is placed on the contact plate 8, and depending on the weight of the pot 17, the
The springs 13 and 16 are bent, and the heat shield tube 12 is slightly lowered, and the central protrusion 8A of the contact plate 8 is moved toward the heat shield tube 1.
It is something to immerse yourself in. Therefore, the radiant heat A of the sheathed heater 1 is blocked by the heat shield tube 12 and does not directly hit the contact plate 8, and since the contact plate 8 is separated from the heat shield tube 12, the radiant heat A is blocked by the heat shield tube 12. It is also not indirectly transmitted to the contact plate 8 via 12. Therefore, the temperature sensing element 4 can accurately detect the bottom temperature of the pot via the aluminum holder 5 and the contact plate 8.

Effects of the Invention As described above, according to the present invention, when no collar or the like is placed on the contact plate, the central protrusion of the contact plate protrudes outward from the heat shield cylinder, so it directly receives radiant heat. Furthermore, since the outer circumferential portion of the contact plate is in contact with the inner flange of the heat shield cylinder, it is possible to receive radiant heat indirectly through the heat shield cylinder. Therefore, temperature detection by the temperature sensing element is performed accurately. Furthermore, liquid and dirt will not enter between the contact plate and the inner tsuba. Next, when a collar or the like is placed on the contact plate, the central protrusion of the contact plate is inserted into the heat shield cylinder, so radiant heat is not transmitted either directly or indirectly. Therefore, the temperature sensing element can accurately detect the bottom temperature of a pot or the like through the contact plate.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a conventional example. Figures 2 and 3 show an embodiment of the present invention, with Figure 2 being a longitudinal sectional view without a pot etc. placed on it, and Figure 3 being a partially cutaway side view with a pot etc. placed on it. It is. 1... Sheathed heater, 3... Outer cylinder, 4... Temperature sensing element,
8...Contact plate, 8A...Central protrusion, 9...Middle cylinder, 12
...Heat shield tube, 12A...Inner flange, 13...First spring, 16
...Second spring, 17...Pot.

Claims (1)

[Claims] 1. A fixed outer cylinder is provided, a heat shield cylinder is supported movably within a certain range on the outer cylinder and has an inner flange at one end, and the heat shield cylinder is moved in a direction in which the inner flange side is separated from the outer cylinder. A first biasing spring is provided, and a contact plate with a temperature sensing element is provided within the heat shield cylinder so as to be movable within a certain range, and by biasing this contact plate in one direction, the outer peripheral portion of the contact plate is internally moved. A temperature sensing device for a heating cooker, which is provided with a second spring that presses against the collar and causes the central protrusion of the contact plate to protrude outward from the heat shield cylinder.